text: # Copyright 2012 Nebula, Inc.
  #
  #    Licensed under the Apache License, Version 2.0 (the "License"); you may
  #    not use this file except in compliance with the License. You may obtain
  #    a copy of the License at
  #
  #         http://www.apache.org/licenses/LICENSE-2.0
  #
  #    Unless required by applicable law or agreed to in writing, software
  #    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
  #    License for the specific language governing permissions and limitations
  #    under the License.
  
  from collections import OrderedDict
  from unittest import mock
  import uuid
  
  from django.conf import settings
  from django.test import override_settings
  from django.urls import reverse
  
  from openstack_dashboard import api
  from openstack_dashboard.test import helpers as test
  
  
  INDEX_URL = reverse('horizon:admin:instances:index')
  INDEX_TEMPLATE = 'horizon/common/_data_table_view.html'
  
  
  class InstanceViewTest(test.BaseAdminViewTests):
      @test.create_mocks({
          api.nova: ['flavor_list', 'server_list_paged', 'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index(self):
          servers = self.servers.list()
          # TODO(vmarkov) instances_img_ids should be in test_data
          instances_img_ids = [instance.image.get('id') for instance in
                               servers if isinstance(instance.image, dict)]
          self.mock_extension_supported.return_value = True
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
          self.mock_flavor_list.return_value = self.flavors.list()
          self.mock_server_list_paged.return_value = [servers, False, False]
  
          res = self.client.get(INDEX_URL)
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          instances = res.context['table'].data
          self.assertCountEqual(instances, servers)
  
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())] * 4)
          self.assertEqual(15, self.mock_extension_supported.call_count)
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), instances_img_ids)
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
  
      @test.create_mocks({
          api.nova: ['flavor_list', 'flavor_get', 'server_list_paged',
                     'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index_flavor_list_exception(self):
          servers = self.servers.list()
          flavors = self.flavors.list()
          instances_img_ids = [instance.image.get('id') for instance in
                               servers if hasattr(instance, 'image')]
          full_flavors = OrderedDict([(f.id, f) for f in flavors])
          self.mock_server_list_paged.return_value = [servers, False, False]
          self.mock_extension_supported.return_value = True
          self.mock_flavor_list.side_effect = self.exceptions.nova
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
  
          def _get_full_flavor(request, id):
              return full_flavors[id]
          self.mock_flavor_get.side_effect = _get_full_flavor
  
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
  
          res = self.client.get(INDEX_URL)
  
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          instances = res.context['table'].data
          self.assertCountEqual(instances, servers)
  
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())] * 4)
          self.assertEqual(15, self.mock_extension_supported.call_count)
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_flavor_get.assert_has_calls(
              [mock.call(test.IsHttpRequest(), s.flavor['id']) for s in servers])
          self.assertEqual(len(servers), self.mock_flavor_get.call_count)
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), instances_img_ids)
  
      @test.create_mocks({
          api.nova: ['flavor_list', 'flavor_get', 'server_list_paged',
                     'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index_flavor_get_exception(self):
          servers = self.servers.list()
          instances_img_ids = [instance.image.get('id') for instance in
                               servers if hasattr(instance, 'image')]
          # UUIDs generated using indexes are unlikely to match
          # any of existing flavor ids and are guaranteed to be deterministic.
          for i, server in enumerate(servers):
              server.flavor['id'] = str(uuid.UUID(int=i))
  
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
          self.mock_flavor_list.return_value = self.flavors.list()
          self.mock_server_list_paged.return_value = [servers, False, False]
          self.mock_extension_supported.return_value = True
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
          self.mock_flavor_get.side_effect = self.exceptions.nova
  
          res = self.client.get(INDEX_URL)
          instances = res.context['table'].data
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          # Since error messages produced for each instance are identical,
          # there will be only one error message for all instances
          # (messages de-duplication).
          self.assertMessageCount(res, error=1)
          self.assertCountEqual(instances, servers)
  
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), instances_img_ids)
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())] * 4)
          self.assertEqual(15, self.mock_extension_supported.call_count)
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_flavor_get.assert_has_calls(
              [mock.call(test.IsHttpRequest(), s.flavor['id']) for s in servers])
          self.assertEqual(len(servers), self.mock_flavor_get.call_count)
  
      @test.create_mocks({
          api.nova: ['server_list_paged', 'flavor_list'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index_server_list_exception(self):
          self.mock_server_list_paged.side_effect = self.exceptions.nova
          self.mock_flavor_list.return_value = self.flavors.list()
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
  
          res = self.client.get(INDEX_URL)
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          self.assertEqual(len(res.context['instances_table'].data), 0)
  
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), [])
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
  
      @test.create_mocks({api.nova: ['server_get', 'flavor_get',
                                     'extension_supported'],
                          api.network: ['servers_update_addresses'],
                          api.keystone: ['tenant_get']})
      def test_ajax_loading_instances(self):
          server = self.servers.first()
          self.mock_server_get.return_value = server
          self.mock_extension_supported.return_value = True
          self.mock_flavor_get.return_value = self.flavors.first()
          self.mock_tenant_get.return_value = self.tenants.first()
          self.mock_servers_update_addresses.return_value = None
  
          url = (INDEX_URL +
                 "?action=row_update&table=instances&obj_id=" + server.id)
  
          res = self.client.get(url, {},
                                HTTP_X_REQUESTED_WITH='XMLHttpRequest')
  
          self.assertTemplateUsed(res, "horizon/common/_data_table_row.html")
          self.assertContains(res, "test_tenant", 1, 200)
          self.assertContains(res, "instance-host", 1, 200)
          # two instances of name, other name comes from row data-display
          self.assertContains(res, "server_1", 2, 200)
          self.assertContains(res, "10.0.0.1", 1, 200)
          self.assertContains(res, "RAM</th><td>512MB", 1, 200)
          self.assertContains(res, "VCPUs</th><td>1", 1, 200)
          self.assertContains(res, "Size</th><td>0 GB", 1, 200)
          self.assertContains(res, "Active", 1, 200)
          self.assertContains(res, "Running", 1, 200)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())])
          self.assertEqual(3, self.mock_extension_supported.call_count)
          self.mock_flavor_get.assert_called_once_with(
              test.IsHttpRequest(), server.flavor['id'])
          self.mock_tenant_get.assert_called_once_with(
              test.IsHttpRequest(), server.tenant_id, admin=True)
          self.mock_servers_update_addresses.assert_called_once_with(
              test.IsHttpRequest(), [server])
  
      @test.create_mocks({
          api.nova: ['flavor_list', 'server_list_paged', 'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index_options_before_migrate(self):
          servers = self.servers.list()
          instances_img_ids = [instance.image.get('id') for instance in
                               servers if hasattr(instance, 'image')]
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
          self.mock_flavor_list.return_value = self.flavors.list()
          self.mock_server_list_paged.return_value = [
              self.servers.list(), False, False]
          self.mock_extension_supported.return_value = True
          res = self.client.get(INDEX_URL)
          self.assertContains(res, "instances__migrate")
          self.assertNotContains(res, "instances__confirm")
          self.assertNotContains(res, "instances__revert")
  
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), instances_img_ids)
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())] * 4)
          self.assertEqual(15, self.mock_extension_supported.call_count)
  
      @test.create_mocks({
          api.nova: ['flavor_list', 'server_list_paged', 'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def test_index_options_after_migrate(self):
          servers = self.servers.list()
          server1 = servers[0]
          server1.status = "VERIFY_RESIZE"
          server2 = servers[2]
          server2.status = "VERIFY_RESIZE"
          instances_img_ids = [instance.image.get('id') for instance in
                               servers if hasattr(instance, 'image')]
          self.mock_tenant_list.return_value = [self.tenants.list(), False]
          self.mock_image_list_detailed_by_ids.return_value = self.images.list()
          self.mock_flavor_list.return_value = self.flavors.list()
          self.mock_extension_supported.return_value = True
          self.mock_server_list_paged.return_value = [servers, False, False]
  
          res = self.client.get(INDEX_URL)
          self.assertContains(res, "instances__confirm")
          self.assertContains(res, "instances__revert")
          self.assertNotContains(res, "instances__migrate")
  
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(), instances_img_ids)
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())] * 4)
          self.assertEqual(15, self.mock_extension_supported.call_count)
          search_opts = {'marker': None, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get']})
      def test_instance_live_migrate_get(self):
          server = self.servers.first()
          compute_services = [s for s in self.services.list()
                              if s.binary == 'nova-compute']
          self.mock_server_get.return_value = server
          self.mock_service_list.return_value = compute_services
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.get(url)
  
          self.assertTemplateUsed(res, 'admin/instances/live_migrate.html')
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
  
      @test.create_mocks({api.nova: ['server_get']})
      def test_instance_live_migrate_get_server_get_exception(self):
          server = self.servers.first()
          self.mock_server_get.side_effect = self.exceptions.nova
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.get(url)
  
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get']})
      def test_instance_live_migrate_list_host_get_exception(self):
          server = self.servers.first()
          self.mock_server_get.return_value = server
          self.mock_service_list.side_effect = self.exceptions.nova
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.get(url)
  
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get']})
      def test_instance_live_migrate_list_host_without_current(self):
          server = self.servers.first()
          compute_services = [s for s in self.services.list()
                              if s.binary == 'nova-compute']
          self.mock_server_get.return_value = server
          self.mock_service_list.return_value = compute_services
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.get(url)
  
          self.assertContains(
              res, "<option value=\"devstack001\">devstack001</option>")
          self.assertContains(
              res, "<option value=\"devstack002\">devstack002</option>")
          self.assertNotContains(
              res, "<option value=\"instance-host\">instance-host</option>")
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get',
                                     'server_live_migrate']})
      def test_instance_live_migrate_post(self):
          server = self.servers.first()
          compute_services = [s for s in self.services.list()
                              if s.binary == 'nova-compute']
          host = compute_services[0].host
  
          self.mock_server_get.return_value = server
          self.mock_service_list.return_value = compute_services
          self.mock_server_live_migrate.return_value = []
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.post(url, {'host': host, 'instance_id': server.id})
  
          self.assertNoFormErrors(res)
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
          self.mock_server_live_migrate.assert_called_once_with(
              test.IsHttpRequest(), server.id, host,
              block_migration=False,
              disk_over_commit=False)
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get',
                                     'server_live_migrate']})
      def test_instance_live_migrate_auto_sched(self):
          server = self.servers.first()
          host = "AUTO_SCHEDULE"
          self.mock_server_get.return_value = server
          compute_services = [s for s in self.services.list()
                              if s.binary == 'nova-compute']
          self.mock_service_list.return_value = compute_services
          self.mock_server_live_migrate.return_value = []
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.post(url, {'host': host, 'instance_id': server.id})
  
          self.assertNoFormErrors(res)
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
          self.mock_server_live_migrate(
              test.IsHttpRequest(), server.id, None,
              block_migration=False,
              disk_over_commit=False)
  
      @test.create_mocks({api.nova: ['service_list',
                                     'server_get',
                                     'server_live_migrate']})
      def test_instance_live_migrate_post_api_exception(self):
          server = self.servers.first()
          compute_services = [s for s in self.services.list()
                              if s.binary == 'nova-compute']
          host = compute_services[0].host
  
          self.mock_server_get.return_value = server
          self.mock_service_list.return_value = compute_services
          self.mock_server_live_migrate.side_effect = self.exceptions.nova
  
          url = reverse('horizon:admin:instances:live_migrate',
                        args=[server.id])
          res = self.client.post(url, {'host': host, 'instance_id': server.id})
  
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
          self.mock_service_list.assert_called_once_with(
              test.IsHttpRequest(), binary='nova-compute')
          self.mock_server_live_migrate.assert_called_once_with(
              test.IsHttpRequest(), server.id, host,
              block_migration=False,
              disk_over_commit=False)
  
      @test.create_mocks({api.nova: ['server_get']})
      def test_instance_details_exception(self):
          server = self.servers.first()
          self.mock_server_get.side_effect = self.exceptions.nova
  
          url = reverse('horizon:admin:instances:detail',
                        args=[server.id])
          res = self.client.get(url)
  
          self.assertRedirectsNoFollow(res, INDEX_URL)
  
          self.mock_server_get.assert_called_once_with(
              test.IsHttpRequest(), server.id)
  
      @test.update_settings(FILTER_DATA_FIRST={'admin.instances': True})
      def test_index_with_admin_filter_first(self):
          res = self.client.get(INDEX_URL)
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          instances = res.context['table'].data
          self.assertCountEqual(instances, [])
  
      @test.create_mocks({
          api.nova: ['flavor_list',
                     'flavor_get',
                     'server_list_paged',
                     'extension_supported'],
          api.keystone: ['tenant_list'],
          api.glance: ['image_list_detailed_by_ids'],
      })
      def _test_servers_paginate_do(self,
                                    marker,
                                    servers,
                                    has_more,
                                    has_prev):
          flavors = self.flavors.list()
          tenants = self.tenants.list()
          images = self.images.list()
          # UUID indices are unique and are guaranteed being deterministic.
          for i, server in enumerate(servers):
              server.flavor['id'] = str(uuid.UUID(int=i))
  
          self.mock_server_list_paged.return_value = [
              servers, has_more, has_prev]
          self.mock_extension_supported.return_value = True
          self.mock_flavor_list.return_value = flavors
          self.mock_image_list_detailed_by_ids.return_value = images
          self.mock_tenant_list.return_value = [tenants, False]
          self.mock_flavor_get.side_effect = self.exceptions.nova
  
          if marker:
              url = "?".join([INDEX_URL, "marker={}".format(marker)])
          else:
              url = INDEX_URL
          res = self.client.get(url)
          self.assertTemplateUsed(res, INDEX_TEMPLATE)
          self.assertEqual(res.status_code, 200)
  
          self.mock_extension_supported.assert_has_calls([
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('AdminActions', test.IsHttpRequest()),
              mock.call('Shelve', test.IsHttpRequest())])
          self.assertEqual(3, self.mock_extension_supported.call_count)
          self.mock_tenant_list.assert_called_once_with(test.IsHttpRequest())
          self.mock_image_list_detailed_by_ids.assert_called_once_with(
              test.IsHttpRequest(),
              [server.image.id for server in servers])
          self.mock_flavor_list.assert_called_once_with(test.IsHttpRequest())
          search_opts = {'marker': marker, 'paginate': True, 'all_tenants': True}
          self.mock_server_list_paged.assert_called_once_with(
              test.IsHttpRequest(),
              sort_dir='desc',
              search_opts=search_opts)
          self.mock_flavor_get.assert_has_calls(
              [mock.call(test.IsHttpRequest(), s.flavor['id']) for s in servers])
          self.assertEqual(len(servers), self.mock_flavor_get.call_count)
  
          return res
  
      @override_settings(API_RESULT_PAGE_SIZE=1)
      def test_severs_index_paginated(self):
          size = settings.API_RESULT_PAGE_SIZE
          mock_servers = self.servers.list()
  
          # get first page
          expected_servers = mock_servers[:size]
          res = self._test_servers_paginate_do(
              marker=None,
              servers=expected_servers,
              has_more=True,
              has_prev=False)
          servers = res.context['table'].data
          self.assertCountEqual(servers, expected_servers)
  
          # get second page
          expected_servers = mock_servers[size:2 * size]
          marker = expected_servers[0].id
          res = self._test_servers_paginate_do(
              marker=marker,
              servers=expected_servers,
              has_more=True,
              has_prev=True)
          servers = res.context['table'].data
          self.assertCountEqual(servers, expected_servers)
  
          # get last page
          expected_servers = mock_servers[-size:]
          marker = expected_servers[0].id
          res = self._test_servers_paginate_do(
              marker=marker,
              servers=expected_servers,
              has_more=False,
              has_prev=True)
          servers = res.context['table'].data
          self.assertCountEqual(servers, expected_servers)
  
      @override_settings(API_RESULT_PAGE_SIZE=1)
      def test_servers_index_paginated_prev(self):
          size = settings.API_RESULT_PAGE_SIZE
          mock_servers = self.servers.list()
  
          # prev from some page
          expected_servers = mock_servers[size:2 * size]
          marker = mock_servers[0].id
  
          res = self._test_servers_paginate_do(
              marker=marker,
              servers=expected_servers,
              has_more=False,
              has_prev=True)
          servers = res.context['table'].data
          self.assertCountEqual(servers, expected_servers)
  
          # back to first page
          expected_servers = mock_servers[:size]
          marker = mock_servers[0].id
          res = self._test_servers_paginate_do(
              marker=marker,
              servers=expected_servers,
              has_more=True,
              has_prev=False)
          servers = res.context['table'].data
          self.assertCountEqual(servers, expected_servers)
  